/*
* Conditions Of Use 
* 
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain.  As a result, a formal
* license is not needed to use the software.
* 
* This software is provided by NIST as a service and is expressly
* provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY.  NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
* 
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*  
* .
* 
*/
package gov.nist.javax.sip.parser;

import gov.nist.javax.sip.header.*;
import gov.nist.core.*;
import java.text.ParseException;

/** parameters parser header.
 *
 * @version 1.2 $Revision: 1.9 $ $Date: 2007/10/22 03:38:20 $
 *
 * @author M. Ranganathan   <br/>
 *
 * 
 *
 */
public abstract class ParametersParser extends HeaderParser {

	protected ParametersParser(Lexer lexer) {
		super((Lexer) lexer);
	}

	protected ParametersParser(String buffer) {
		super(buffer);
	}

	protected void parse(ParametersHeader parametersHeader)
		throws ParseException {
		this.lexer.SPorHT();
		while (lexer.lookAhead(0) == ';') {
			this.lexer.consume(1);
			// eat white space
			this.lexer.SPorHT();
			NameValue nv = nameValue();
			parametersHeader.setParameter(nv);
			// eat white space
			this.lexer.SPorHT();
		}
	}
	
	

	protected void parseNameValueList(ParametersHeader parametersHeader) 
		throws ParseException{
		parametersHeader.removeParameters();
		while (true) {
		        this.lexer.SPorHT();
			NameValue nv = nameValue();
			parametersHeader.setParameter(nv.getName(), (String) nv.getValueAsObject());
			// eat white space
			this.lexer.SPorHT();
			if (lexer.lookAhead(0) != ';')  break;
			else lexer.consume(1);
		} 
	}
}
